NS7520B-1-C55 Digi International, NS7520B-1-C55 Datasheet - Page 42
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NS7520B-1-C55
Manufacturer Part Number
NS7520B-1-C55
Description
IC ARM MICROPROCESSOR 177BGA
Manufacturer
Digi International
Series
NET+ARM®r
Specifications of NS7520B-1-C55
Applications
Network Processor
Core Processor
ARM7
Program Memory Type
External Program Memory
Controller Series
-
Ram Size
External
Interface
EBI/EMI, Ethernet, DMA, SPI, UART
Number Of I /o
16
Voltage - Supply
1.4 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
177-LFBGA
Lead Free Status / RoHS Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
NS7520B-1-C55
Manufacturer:
IR
Quantity:
4 954
Company:
Part Number:
NS7520B-1-C55
Manufacturer:
Digi International
Quantity:
10 000
Part Number:
NS7520B-1-C55
Manufacturer:
NETARM
Quantity:
20 000
SRAM WE write
WE* controlled write (wait = 2)
Notes:
1
2
3
4
3 8
TEA*/LAST (note-4)
S R A M t i m i n g
At least one null period occurs between memory transfers. More null periods can occur if the
next transfer is DMA. Thirteen clock pulses are required for DMA context switching.
Port size determines which byte enable signals are active:
–
–
–
The TW cycles are present when the WAIT field is set to 2 or more.
The TA* and TEA*/LAST signals are for reference only.
TA* (Note-4)
write D[31:0]
Async WE*
TA* (input)
CS0WE*
BE[3:0]*
CS[4:0]*
A[27:0]
8-bit port = BE3*
16-bit port = BE[3:0]
32-bit port = BE[3:0]
BCLK
RW*
Note-2
6
36
12
T1
N S 7 5 2 0 D a t a s h e e t
27
9
TW
29
19
30
31
T2
14
0 3 / 2 0 0 6
15
30
31
Note-1
29
19
36
27
13
T1